Roof or floor structure.



L. BAUMGARTL.

ROOF 0R FLOOR STRUCTURE. APPLICA'TIOH mm OCT. 19.1914.

Patented May 25, 1915.

LEROY BAUMGABTL, OF CHICAGO, ILLINQIS.

ROOF 0R FLOOR STRUCTURE.

I Specification of Letters Patent.

Patented May 25, 19153..

Application filed-O ob 1 19M, krial 1310. $614.86.

Tall whom it may concern Be it known that 1., Laser BAUMGARTL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful mprovement in Roof or Floor Structures, of which the following'is a specification.

My invention relates,'m0re particularly, to roofs of buildings, though not limited thereto, formed of slabs, or tile, of concrete, or other material.

It is the practice in forming roofs of slabs, or tile, to lay beams or girders in parallel relation to form supports for the slabs or tile and then apply the slabs or tile to these beams or girders to rest at their ends on the latter, each slab, or tile, partially overlapping the beam or girder and opposing the end of the adjacent slab or tile. The beams or girders are generally of structural steel with flanges, the upper flanges of the beams, or irders, providing the seating surfaces for the slabs, or tile, at the ends of the latter. In order that the slabs or tile have suliicient bearing on the beams or girders, the upper seating flanges of the latter are required to be of a greater width than is required for the desired strength of the structure and consequently the expense for beams or girders is greater than where strength alone is to be considered. Furthermore, these beams or girders are provided in relatively long spans and owing to the method of manufacture employed are more or less sinuous, as distinguished from being perfectly straight, which requires that the upper flanges of the beams or girders be of such width that such variations in the upper flanges will not reduce the seating area for the slabs, or tile, to a degree which would impair the stability of the structure. Thus the upper flanges of the beams or girders are made much Wider than would be necessary if they were perfectly straight, which renders the structure comparatively costly to manufacture.

My object is to reduce the cost of such structures without sacrificing strength or stability. 7

Referring to the accompanying drawings: Figure 1 is a perspective view, partly scctional, of a Section of a roof constructed in accordance with my invention; and Fig. 2, a perspective view of one of the similar shoes employed as a part of the structiu-e.

In carrying out my invention I first position upon the walls which are to carry the floor, or roof, beams or girders arranged in parallel relation, these beams or girders he- .ing spaced apart a distance substantially set on edge, these girders resting at their" lower flanges 4 on the under structure, (not shown) and providing upper flanges 5.

After the girders 3 have been posin'oned as stated, shoes 6 are applied to the upper flanges 5 thereof to form seating surfacm for the ends of the slabs, or tile, represented at 7. The shoes 6, which may be of any suit, able form and material, are shown as formed of concrete reinforced by wire mesh 8 extending longitudinally thereof, these shoes being of general rectangular form and pro vided along their under sides with. channels 9 at which they are adapted to rad/die the upper flanges 5 of the girders 3, thus interfitting therewith as illustrated in Fig. 1.

The tile represented at 7 are adapted to rest at their ends on the shoes 6, each tile 7 seating at its end on the adjacent shoe 6, and preferably overlapping the latter about onehalf of the width of the shoe, whereby eac shoe forms a bearing surface for the ad cent ends of end'wise opposing tile, as represented in Fig. 1, the ends of the tile Where they overlap the shoes being preferably shouldered, as represented at 10. The shoes (3 thus form the seating surfaces for the ends of the; slabs, or tile, 7 and may be formed of any desirable width, it being preferred that for ordinary roof construction they be about five inches wide, which affords a seating surface for the slabs or 'tile of sufficient width to compensate for any irregularities or variations in the girders 3.

After placing the tile 7 as stated, the spaces between adjacent tile may be filled with elastic cement, or any other suitable material, and if desired the upper surface of the structures thus formed coated with any suitable waterproof material. It will be understood, however, that this last-referredto procedure is the one usually adopted ivhere plain tile like that shown are used,

and when other forms of tile are employed, this may not be a necessary step. This is, however, inunaterial to my invention, the novelty of which does not extend beyond the laying'of the slabs, or tile.

It will be understood frornthe foregoing that, inasmuch as the effective seating surface for the tile is furnished by the shoes, girders or beams of a width much less than that required if the shoes were not provided,

may be used and thus the cost of construction is greatly reduced.-

It is preferred that the shoes 6, which vantage in that, Where the beams, or girders, are deflected, the relatively Wld8 bearing surfaces afforded by the shoes permit of the use of mortar applied to the upper surfaces thereof, or shims, for leveling the seating surface for the slabs, or tile, whereby an even floor or roof structure may be provided.

While l have illustrated and described a particular-embodinient of my invention, I do not wish to be understood as intending to limit it thereto, as the same may be modified. and altered Without departing from the spirit of my invention.

What Iclaim as new and desire to secure by Letters Patent, is:

1.. In building construction, in igfembinai tion, flanged beams or girders, shoes of a width'exceding that of the beams or girders and adapted to rest on and extend along the upper surfaces thereof whereby to afford an increased bearing area, and slabs or tiles spanning the space between said beams or girders with heir ends bearing'on said shoes.

2. In building construction, in combination, flanged beams or girders, shoes of a width exceeding that of the beams or girders and adapted to rest on and extend along the upper surfaces thereof whereby to afford an increased bearing area, and slabs or tiles spanning the space between said beams or girders and having shouldered ends bearing on said shoes.

3. In building'construetion, in combination, flanged beams or girders, shoes of a width exceeding that of the beams or girders and hating channels on their under sides and adapted to rest over the upper surfaces thereof and extend along the same whereby to afford an increased bearing area, and slabs or tiles spanning the space between said beams or girders with their ends bearing on said shoes.

tion, flanged beams or girders, reinforced shoes of a width exceeding that of the beams or girders and having channels on their under sides and adapted to rest over the up per surfaces thereof and extend along the 4. in building construction, in combinasame whereby to afford an increased bearing area, and. slabs or tiles spanning the space between said beams or girders with their ends bearing on said, shoes.

L. Hrnsmn, A. C. Fiserrnn. 

